The incident resulted in a 16-year-old boy suffering a fractured skull and being taken to Derriford Hospital where he remains unconscious in what has been described as a “critical but stable condition.”

Investigators have said an altercation happened between several youths, resulting in the teen requiring urgent medical treatment.

A 22-year-old man from Plymouth and a 15-year-old boy from Plymouth have been arrested on suspicion of grievous bodily harm and are currently in police custody.

Det Insp Paul Weymouth, who heads the inquiry, has told The Herald: “This incident is not related to any school or college and is not gang related.